Recently, whenever I use i-tunes, I receive a pop-up message telling me

"iTunes requires Safari 4.0.3 or later to be installed to use the iTunes Store within iTunes. Use Software Update to download and install the latest version of Safari."

The problem is, OSX 10.5.8 doesn't support this version of Safari.

I can't find any way to cancel the pop-up message - every time I select a track or a playlist, go to my library - or anything at all - I receive the pop-up and have to cancel it manually and it's driving me mad.

I've tried installing the latest version of Safari and I've tried ignoring the software update, but the pop-up just keeps coming and it's driving me mad.